CNC West Oct Nov Web

82 www.CNC-West.com CNC WEST October/November 2018 New Products HP High Productivity HMCs —Doosan Doosan Machine Tools has in- troduced its new NHP horizontal machining center (HMC) series, built from the ground up for rapid metal removal rates. The 400 mm pallet NHP 4000 and 500 mm pallet NHP 5000 are configu- rable for a range of applications. The NHP machines come standard with a 15,000 RPM spindle with 140 HP and 169 ft-lbs. of torque. For heavy cutting, a high-torque 15,000 RPM spindle with 223 ft-lbs. is available and a 20,000 RPM spindle is in develop- ment for customers with higher speed precision applications. Up to 1G acceleration/deceleration on X-, Y- and Z-axes enhances produc- tivity, delivering productivity increases as high as 25% over the previous model. Ball screw shaft and bearing cooling systems keep the temperature of fast moving axes stable, ensuring precision machining. The new random access disc-type tool magazine allows high-speed 0.9 second tool-to-tool and 2.3 second chip-to-chip times. In addition to mini- mizing non-cutting time, this design also reduces vibration. In optimizing the construction of the machine, the footprint of the NHP has been reduced by 15% compared to the previous model, yet the machining area has been expanded by 18%. The three-point leveling design makes machine installation and maintenance much more convenient, and the center- through bed evacuates large volumes of chips efficiently. The pallets can accommodate loads of up to 880 lbs. for the NHP 4000 and up to 1,100 lbs. for the NHP 5000 and both through-pallet and overhead hy- draulic fixturing options are available. Additionally, theAPC has been refined to achieve a 27% faster indexing time.